Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire;

FIG. 2 is a front view thereof;

FIG. 3 is a plane view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a fragmentary enlarged view showing the details of the tread portion thereof;

FIG. 7 is an end view taken along line 7-7 in FIG. 6; and,

FIG. 8 is an end view taken along line 8-8 in FIG. 6.

Since the design is symmetrical, the bottom view, which is the same as the plane view, and the left side view, which is the same as the right side view, have been omitted.

The broken lines in the drawings illustrate the unclaimed environment of the design, and form no part thereof. 

CLAIM The ornamental design for a tread portion of an automobile tire, as shown and described. 